<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2016 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: 流年 <liu21st@gmail.com>
// +----------------------------------------------------------------------

// 应用公共文件
/**
 * 删除目录以及其下的文件
 * @param  $directory
 * @return bool
 */
function removeDir($directory): bool
{
    if (false == is_dir($directory)) {
        return false;
    }

    $handle = opendir($directory);
    while (false !== ($file = readdir($handle))) {
        if ('.' != $file && '..' != $file) {
            is_dir("$directory/$file") ? removeDir("$directory/$file") : @unlink("$directory/$file");
        }
    }

    if (readdir($handle) == false) {
        closedir($handle);
        rmdir($directory);
    }

    return true;
}

/**
 * @return mixed
 */
function isMobile()
{
    $web = 0;
    $mobile = 1;
    $wx = 2;

    // 判断是否是微信浏览器
    if (strpos($_SERVER['HTTP_USER_AGENT'], 'MicroMessenger') !== false) {
        return $wx;
    }

    // 如果有HTTP_X_WAP_PROFILE则一定是移动设备
    if (isset($_SERVER['HTTP_X_WAP_PROFILE'])) {
        return $mobile;
    }

    //此条摘自TPM智能切换模板引擎，适合TPM开发
    if (isset($_SERVER['HTTP_CLIENT']) && 'PhoneClient' == $_SERVER['HTTP_CLIENT']) {
        return $mobile;
    }

    //如果via信息含有wap则一定是移动设备,部分服务商会屏蔽该信息
    if (isset($_SERVER['HTTP_VIA'])) {
        //找不到为flase,否则为true
        return stristr($_SERVER['HTTP_VIA'], 'wap') ? true : false;
    }

    //判断手机发送的客户端标志,兼容性有待提高

    if (isset($_SERVER['HTTP_USER_AGENT'])) {
        $clientkeywords = array(
            'nokia', 'sony', 'ericsson', 'mot', 'samsung', 'htc', 'sgh', 'lg', 'sharp', 'sie-', 'philips', 'panasonic', 'alcatel', 'lenovo', 'iphone', 'ipod', 'blackberry', 'meizu', 'android', 'netfront', 'symbian', 'ucweb', 'windowsce', 'palm', 'operamini', 'operamobi', 'openwave', 'nexusone', 'cldc', 'midp', 'wap', 'mobile'
        );

        //从HTTP_USER_AGENT中查找手机浏览器的关键字
        if (preg_match("/(" . implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT']))) {
            return $mobile;
        }
    }

    //协议法，因为有可能不准确，放到最后判断

    if (isset($_SERVER['HTTP_ACCEPT'])) {

        // 如果只支持wml并且不支持html那一定是移动设备
        // 如果支持wml和html但是wml在html之前则是移动设备
        if (
            (strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') !== false)
            && (strpos($_SERVER['HTTP_ACCEPT'], 'text/html') === false
                || (strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') < strpos($_SERVER['HTTP_ACCEPT'], 'text/html')))
        ) {
            return $mobile;
        }
    }
    return $web;
}
